Since segment polarity genes are most active in cellular blastoderms, these gene

Question

Since segment polarity genes are most active in cellular blastoderms, these genes encodes many signaling pathway components to facilitate cell-to-cell communication.

True or False

Gastrulation in fruit flies helps organize the three germ layers.

True or false

A male fruit fly that is homozygous for a null mutation in the nanos gene was mated with a wildtype female fruit fly. What would the phenotype of the progeny be?

half of the progeny would have defective posterior development

half of the progeny would have defective anterior development

all of the progeny would be missing abdominal segments

all progeny would be wildtype

all of the progeny would die during embryogenesis

half of the progeny would have defective posterior development

half of the progeny would have defective anterior development

all of the progeny would be missing abdominal segments

all progeny would be wildtype

all of the progeny would die during embryogenesis

Explanation / Answer

segment polarity genes are most active in cellular blastoderms, , these genes encodes many signaling pathway components to facilitate cell-to-cell communication.

True

Gastrulation in fruit flies helps organize the three germ layers.

True

A male fruit fly that is homozygous for a null mutation in the nanos gene was mated with a wildtype female fruit fly. What would the phenotype of the progeny be?

Right answer is ‘C’ all progeny would be wildtype

because nanos genes are from maternal side that is from female fruit fly

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